Calculating-machine.



No. 820,880. PATENTE D MAY 15, 1906. O. F. LAGANKE & J. A. SMITH.

CALCULATING MACHINE.

APPLICATION FILED June, 1905.

' 9 SHBETS-SHBET 1.

w'bb'meaoo o I No. 820,880. PATENTBD MAY 15, 1906. G. P. LAGANKE & J. A. SMITH. CALCULATING MACHINE.

APPLICATION FILED JAILZB, 1905.

9 SHEBTSSHEET 2.

No. 820,880.' PATENTED MAY15, 1906. G. F. LAGANKE & J. A. SMITH. CALCULATING MACHINE.

T AFPLIOATION ILLED JAN.26 1905. 9 SHEETS SHEBT 3- Shaft/1,?

att c-amen No. 820,880. I PATENTED MAY 15, 1906. O. P. LAGANKE &-J. A. SMITH.

GALOULATING MAGETI'NE.

APPLIOATION FILED JAN.26, 1905.

9 SHEETS-SBBET 4.

/ aw-vewtom mazes Ebaganke, John j]. Strait/Z wbbmcooea Q4 v J No. 820,880. I PATENTED MAY 15, 1906.

C. P. LAGANKE 65 J. A. SMITH.

a SHEETS-SEEK: s

CALCULATING MAOHIEE.

. I iW APPLICATION FILED JAN,26, 1905.

wnuum q VHM e we a No. 820,880. PATBNTED MAY 15, 1906. G. F. LAGANKB & J. A. SMITH.

CALCULATING MACHINE. APPLIUATIOH FILED names, 1905.

9 SHEETS-SHEET 6.

No. 820,880. PATENTED MAY 15, 1906. O P. LAGANKE & J. A SMITH.

OALGULATING MACHINE.

APPLICATION FILED JAN.26, 1905.

- f x (iii/MU 5 PATENTED MAY 15, 1906. G. F. LAGANKE (Y; J. A SMITH. CALCULATING MACHINE.

APPLIOATION FILED JAN.26. 1905.

9 SHEETS-SHEET 8 Wi t 1 LC 0 Ac 0 Mena e. YATENTED MAY 15, 1906,

' F. LAGANKE & J. A. SMITH GALOULATZNG momma,

APPLIOATION FILED JALL26, 1905.

SE-EET-SSHEET 9.

Qmw w I @35 Q gawfizmm l a I Uhliiiliiiii LAND,

Hi0, ASSKGNORS TO ELlJliGTT-FlSi-HQR COEtiPf- NY OF NEW YORK, N. Y., A CORPORATION (11 DELAWi-UQZE.

Application filed January 28 To all whom, it 711/651] concern:

Be it known that we, Enemies FRE ERICK; LAGANKE and JOHN Asecm' SMITH, both citizens of the United States, residing at Cleveland, in the county of Cuyehoge and State of Ohio, have invented a new and uses ful Colculatingdviachine, of which the IOllUw ingi's a specification.

This invention relates to :1 calculatingnmchine, and more particularly to one of that type in which the numbers included in the computation. are IGfil (led by a type- Writing' n'iechanism, the numeral keys of which operate the coi'oputing device woii as the recording devices Considered in a somewhat more specific aspect, the invention relittes to on impioveai form of operating mechanism For trensi'nit ting motion from the numeniti-keys to the con'lputing devicc, the invention being espechilly directed. to the provision of [means whereby each key when operated will. 1 certainty oiiect a proper movement ol' operati 11g moch mi sin corresponding in extent or degree to the numericalvelue oi the omticular key depressed.

Suhordirmte "to this general object, the several sjmcific objects oi the invcn ,[DH may he E V I stat as follows:

First; To prevent Oveijilli'lniiflf oi the mes-3'- ter-wheel. his end is ai/i/itlhfig by I)T0\"ll'iinn a series of spirally-arranged sto )s mov alile with the master-W1 eel es the letter is operated by a key and arranged to col with another of stops, one of w adv-aimed hy key into the p iii apgoiwipriztte stop oi the spi iv rr I'iQ-S, tin-it {LS the master-- iiinit of its prope moveimmt it Wii. he or rested with certainty and precision.

Secomt. 'lo siippiemciit the stop mocheiiism by providing a, cliccic-iiin o Ql'ttit ii my the stop mechanisi'ii to engage imo check the master-wheel at the proper time This end is attained by mounting the check-mm on :i choclvsha/lt equipped with a. lateral arm or plate :iri'engecl to be struck bye-nyof the keyset stops to rock the shaft, em? thus throw the chock-arm to its operative position.

Third. To provide impi'oved means for preventing excessive movement of wheci which is carried or advanced by the Wheel bein g opera-ted. This end is attoiiiod by providing Specification of Lott 5 Patent.

Patented. may 15, 1906.

, 1985. Serial i- 'o. 242,720.

:1. slide halving operative connection with the check-shaft and arranged to be projected into engagement with a wheel ol the computing device simultaneoiisly with the move m 'it of the ch \mkitlln into engagement with t wastes-H sol.

u'th. 'vlo provide me is whereby the and recording mechanism may oil from the computing device digits may be printcth es, for setting down the total of com--- nipiitiug device. ihis eml is attained by providing in an accessible position at total he; or love? whic. W hen. depressed. will move (xi-11min element-sot the operating connections "to inoper i ve positions.

iii ith wi lc automatic means for rehe opci'etive coni'iectioii between the i h ve and the computing device after the total has amen printed. This end is Z1hi.i1liii by provicmg totel liey-atetractin: haiiisin ei'i'nngco to be operated by a tn as he recording mechanism is drawn hook or ietis-o (l preparatory to the printing of a, new line 0 Meters.

Various other ObjClJtS ofthe invention and additional s i' ictmni features will he pointed out and ii, succeeding description is (ls l, and the invention in its vmimis as cats will he succinctly defined in the rippomimi claims.

zmyi g ings is portion 0'! mi E liotishcr pod in accordance h the cal section of the Fig. 3 is e. chin View iihzi'ged scale and desi neo to show the specific s qr ntioiiiesides. F1 the -nl'iie ITIG('-i)itlll$ ii), if is i-is nhicil on the cover-pinto of the Fig. 5 is 21 rear elevation ol the v "1th the computing; device and its simport fiIHlii-Qi'i. Fig". 6 :1. hottom plan zissmohicti on the under side thereof. is c: dev led elevation showing the techie-:1 associated parts, including m the means for revoiiting rom of the wheel, mid the means the 'ronnections are released to per- 2r retraction, Fig is e detail view ziion w hoot effecting the operation of w oi the covei plnlxa, showing: the "various showing the manner in mch the total-l ey 'in which the total key or lever is operated to effect the d isdonnmtion of the keys and recording mechanism from the computing device, the positions assumed by the parts when the disconnection has been ellected being indieated in dotted lines. Fig. 10 is a sectional elevation showing the relation of the key-set stops to the spirally-arranged series of cooperating stops. Fig. 11 is a similar view showing the key depressed and the various parts in the positions they assume when one of the key-set stops, having been moved to its operative position by the key, arrests the act-uator-shal't hy engagen'ient with one of the stops of the spirally-arranged series. Fig. 12 is a. sectional elevation showing one complete connectionthat is to say, that group of elements which serves to operatively connect one of the nunnzrel-heys with the actu-- ator-shalt. Fig. 13 is a sectional view designed more especially to show the relation of the cheek-arm to the master-wheel. Fig. 14: is a detail view of one of the sl.o -shiltine: levers. Fig. 15 is a detail View of one of the stops. \l ig. 16 is a detail View of the tot-ah key-retracting lever, and Fig. 17 is a section through the actuator-shaft and associated parts.

Each part or structural feature is desiq nated by its approrniate reference chararllm throughout the views.

The suhjcot-matter o'i this invention is primarily a calculating-machine, since the novelty resides more pznlicularly in the mechanism for operating and controlling the primary elementsas, for instance, nrnnbcrwheels-oi a computing device, The illustrated embodiment of the invention, horvever, has been devised with special reference to its employment in :1 combined 'alcnlaiiinr and recording, machine. of that type in ill a computing device is disposed for operai ion by the numeral-keys ol' a. typewriter, said keys serving both to operate the compul in or calculating mechanism and to cause the printing of the digits included in the eomputation. For the purpose oi this disclosure we have selected a type-writing machine ol that cl ass whic rare known as llat-platen or book type-writers, the particular machine illustrated being what is known comma ,cially as the lillliot*l isher typchvriter,

exemplified in Patent No. 537,368 to R. J. Fisher, to which reference is made for a more complete dlsclosure of the recordiim mechanism than is thoughtto be necessary in the presenreonnertion.

The genemlorgamdza trio n oft]! e ti /pe The type-Writer here shown embodies a me chine-frame l, mount-ed lo travel longitudi- 3, connected at their lower ends to key-levers 9, Fulcrumed. within the carriage-casing 5. The key levers 9 are connected through draw-Wires 10 with downwardly-swinging t 'pl-i-hars ll, :arried by a typeq'irr; 12, pend ent from the carriage-casing. (See Fig. 2.) T he carriage 4 is moved to the right by carriage-pnmelling mechanism inchiding tapes ili3, counccted at their inner ends to the carriage and at their outer ends to spring-drun'is (not shown) mounted on the rnachine-l'r:.ime.

The step-l step advance of the carriage in the direct on of letter-spacing is controlled by carriage 4 feeding; mechanism, including racks H, associated with the carrilure-guides l and 2% and meshing: witlrpinions 15, 'lixeil to the teed-spindle 16, extending transversely ol the carriage and carrying the cscapemerdwheel 17. "lhe Wheel 17 is alternately engaged by the escapemamt-dogs 18, one oi" which shown in Fig. 13. The .aq iemenl, including the ratchet 'escapement-wheel 1'7 and the dogs iii is operated from the keys in a manner Well understood in the art, and it is tllou ht to he. unneeessa'i r to descrihe the operating connection further than to say that ll includes sn lugging ii'cv-yolce if), mounted Within the resin; and arranged to be engaged and swung; by any one ol' the sev ral pins 20, which r...,l.eud from the deans of the nun'icralkeys, as shown in iii 2. By this means the d orcssion of n he" no print a digit will cause the escapenient do s and the shilling of h when the l\' is .ras d the dogs will be per .lnittcil to shill. laerh. to th ir nomal positions, and lv varri s will siinultaneousl advance the distance ol' onelot'ter tee to the right.

'lfur "relation fin" worn mi ling (lamina to the Z I/ HP'IM i/Hf] IltiMfliH/f; in WW1 oi the maported in parallelism ther 22. 0n the bar 11 is slidably sug'iporterl a. computing derive or register 22%, de-zig dyll lo be shii'tcd along the bar and secured in position for use n-itl'iresp to a column located any point on the 'l-SlEOPt HLli IIPUl'i/Oil by the platen. The device 22-5 includes 5 cash 5 which contains the comput n and registeringniechanism, the specific elr' ler oi which constitotes no part of the nt-sent invention. Suflice it to say that it includes, a 1 usual, a s ol" i'lenoininelional ineinhers, digit-rairiers, or Ill!llll)l'--\\'l1(l li-; designed to register hundredths, lent hs, uni. tens, hundreds, thousands, ten thouminds hundred thousands,

3 5 servablethrough the sight-openin nd number 32 will now be a ded by im 60 or tens wheel a single increment to sive, preferably formed in or upon the end faces of the peripheral teeth, one digit of each wheel being observable through a sight opening 24,- at' the'upper front corner of the casing Each digit-carrier or number-wheel is arranged to make nine-tenths of a complete rotation independently of the other wheels of the series to present. its digits successively before the sight-opening and during its next or tenth increment of movement car- I 5 rice the next wheel to the left a single increment or step, after which the first-named wheel may again rotate independently for ninetenths of a complete rotation before again advancing the adjacent wheel at the 29 left a single step Since the wheels of the entire series are related to one another in the manner stated, it follows that mechanical computations in addition may be effected by moving the wheels corresponding in order or 2 5 denomination to the order of the digits composing the numbers to be added a number of increments corresponding to the unitary values of such digits. Thus suppose it is desired'to add 23 and 32. The ciphers of all the wheels being disposed opposite the sightopening, the tens-Wheel will be moved two increments, presenting the digit 2 to view. The units-wheel will then be rotated three increments, and the number 23 will be ob- The secparting to the tens-wheel three additional increments of movement and to the unitswheel two additional increments, thus causing the numerals presented before the sightopening to read 55, the sum of the two numbers. Since the numerical value of each rder or denomination of the column is ten and since each wheel during its last or tenth increment of movement will, as heretefore explained, impart a single increment of movement. to the ficxt adjacent Wheel of higher order, it follows that when the number reaches the limit of the numerical value of a given'or- 5o der or denomination the rotation of the adjacent wheel to the left will effect the registration of a digit of the next higher order. For instance, assuming the first order or units wheel to be given nineincrements of move,-

5 5 ment during the presentation of the digit 9" opposite the sight-opening, the next or tenth increment of movement will present the O on said wheel before the sight-opening and will simultaneously advance the next higher resent the digit 1 of the second order or enomination-before the opening, the presentation of the two digits 0 and 1 in the first and secondorders effecting the registration of the v ndmber 10.

The 77LL188T-1U7L6Z and its operating connectt'0ns.-Upon the carriage 4 of the type-writing machine is mounted that portion of the computing mechanism which constitutes the operating means for the computing device proper, which, as we have seen, is mounted on the machine-frame. The primary element of this actuating mechanism is a master-wheel 2 5, presentable to the several Wheels of the computing device in succession by the step-by-step advance of the carriage in the direction of letter-spacing. The master-wheel is designed to rotate the computing-wheels in proportion to the numerical value oi the digits embraced by the computation. The 111aster-wheel is keyoperated, and the operating-keys in the illustrated embodiment of the invention are the numeral-keys oi the type-Titer, although it is obvious that, viewing the invention as a calculating-machine, regardless of the recording of the digits upon a Work sheet or page it is immaterial whether the keys perform. any function other than the actuation of the in aster-wheel. I

By reference more particularly to Figs. 2, 3, 5, and 17, it will be observed that the masterwheel is ri idly mounted upon a short shaft 26, journalcd at the rear side of what may be termed the actuatonframe 27, mounted in any suitable manner upon the remov able top or cover 5 of the carriage-casing 5. From one side of the inast'er-wlieel extends a toothed clutch-flange 28 formed withratchet teeth arranged to be engaged by what may be termed the master-wheel clutch 29, slid ably and rotatably mounted on the actuator-shaft 26 and designed to effect an operative connection between the master-wheel 25 and an operating pinion 30. The pinion 30 is preferably integral with one end of what I shall term a stop-shaft 31, to be more fully described hereinafter. The shaft 31 is alined with the shaft 26 and is likewise journaled in the actuator-frame 27 ,the pinion 30 preferably having a central bore 30 Within which one end of the shaft 26 is received and supported. By reason of this mounting of the shafts 26 and 31 they are capable of independent rotary movement. The master-wheel clutch 29 is constantly urged toward its engaging position by springs 32, suitabiy interposed between the pnion 3i) and the clutch. in order that the connection between t 1e pinion and the clutch may be maintained regardless of the movementof'the clutch into and out of en ga ernent with the master-wheel, the pinion I es carried at the extremity 0,.

ride upon the inclined l mes of the t formed on the flzn'ige 28, thus urgn the clutch 12'.) laterally ziq'uinst the resistance of the springs 32 and permitting the rotation of the eluteh with the pinion and imlepondently of the I11 LStP,I'-\VhCOl. The operating eonneetion between one mnnerel-lieys and the atetw alter-pinion30 i1iuludesnnaetna. -lever Fig. 12-.) moninzed on a short shaft 36 in the aetuetoi i'rmm and pro ided with a rotmetirig-spring I57, ermirc inq the shaft and tending to-nmve the leVLL to its retri'ut 5rd positien. The lever 35 is i'ulerlmlecl ecljeeent to its front end and is fern ed at its oppesi extremities with tootl 10d :5

Li] a {U'HD'lS 13S and 39, the former meshing with the pinion 30 and the latter with :t tootl'lml segment or reel; 4U, 11 reels-arm preje ting through the plate 5" from shaft "l2. vis mounted i" no shaft -2 iny-lvrnekets l3, pendent from the .x.ino'veble cover-plate 5" of the carriage-e21sing. This reek-shaft 42 eonstitutw :1 motion-tronsmitting moment mounted within the en Triage-e? ing nml common to all of the n :ineru l that is to say, the DUHlOl'itl-lIUYS are L s gnml to impart :1 different degree 05 n w went to the reek l t "12 For the n, "was 0% tiei'islnitting iilir i Llle letter :u'nii inter-- mediate eounectl Q Snell inu'vmnont m the nnister-whe l as will eer e to advance :1 il; "lcarrier or number-wheel a number of in I ments eorrespimding to tilGfrlDlfUf value of the key depressed. 'llw eper ling :0nne(:-- tions betwe )n the l; inelnrle :1 series of loose orally tron'i the shaft and ends isposm'l for on stmneorprejeetionaZt). fuljzreont to 4 t h loose urn: m] nipped with :1 eompzrrntive :Execi :1 rn'r "'16, provided with n lateral i neutron l osed under the zxdjiuzent lone arm, so 4 wt when the l or is-swung rlewn in ill-ode 'zres mien of in key it will engiigrn in :"xml arm, 21ml films swing the lnH s' enrla partial rub?- ien ol' the time I llornmll lul'tl1 kev slmai imi2thn'vln anger .men "1 tln-topol them-Niage-i: HfJIrHMEOW'I' ii. III Serving to limuv -l.

1w shalt i2 is he upw s \lineetlwelreiu-si o'l unil'erm lo M {lllli slew sn'lily emf}! in in dill cm merit to the shaft 42 in vol) the mines of l'nrs vvml (ligiis, gjn'e rmule l'or more or lmerli 5t mm/enroll ,oi' the ke -5:, To this end the f posed in grad ea 4) to lllHpOrlO the (lillerent heir en V -36 at the egt me left-lined mni q no :mries will be LllSI'xO l :1 4t sullieiuit nee lwlow the pin 5'0 of the 5. key to pr mt .mrlz wmlent nlovsn'wnt el' l (luring: ninths el' ilr's strolqe, alter whielx the :uijerrni;

Iii-T- 1. w loose u rm cwith the fixed arm and swings it to row: the shaft 42. This move- D] on t of the re heft is sull'ieient te effect one inerenient oi movement of the master Wheel and :1 Similar movement of {the computing-Wheel iii-mesh. therewith, 1t bemg obvious that when the shaft 42 rocked by 21' liIBV in the manner bleseribod the stirm41 will swing, thus 3S tl'rereon to rotate the pinion 1 it the .mmster-wheel, which in turn rotates a. wheel of the computing device. 'llae several Mn; 46 to the right of the one wl'wse o'p-Qrur xm he just been described are lOCzLl (i pr 1 in higher planes, so that the mo on it 01 mid arms, and conseqlgwntly the n'iovonient of the rook-Shaft and the operating mmnections between it and the musteanvheel, will be increased in accordance with the nu'reuise in numerical value of the kr- Tlie rostejr tion of the roel-=sl1ett 42 to run-11ml position when the 146 Y clepro l is pern'ntted to rise is efloeteu by a rct'rzu. ing--s prn1g; 48. (See Fig. 4

1/: w m ,ml rmd fbr prowl ting the retraction of" the 7mm?" "heal-1 "ruling wma'tectimzs n (I he 1 rim; 1 om (m tlaGeZW/LPitlid"857%)?66. Reel to one side of the 'lllfiStQf-W leel 25 is a min whorl ll limiter 5U, wlneli tends to compel the eeeu-v tier: o! the mnete'i ivlleelwhen the nahto rest, so that the teetl1. el' said I n1 move will! certainty and precision rate in the mar! 2 l'vzmoerwx lemma er; the retehe" arm 5 lever in addition to the 49 is engaged. by an (Extending: upwardlyfrein a locking.- 'ruwwrl, 9 11-525, upon a suit within the netmter ems, out to one .w'lilu thereol'. Normally the :1 feet; of the ratchet A) in a. o lotion timreof lHE locki ug ie /e1 333 3,1 ml A. tripislernm the leelairnpwver 52 ts-- .J'f": irulleutmi in full li es in I the lever .52

i2 Lerl in dotted lines in nine-:11 ml" the looking T i lorkin end 53 thereof iw- V v A" uegged aga nst "Hating; the lever alndcaus Th1 means ("or go's venting 'mwrse rotation of Fig. 7 engaged by a mi'wuen the well ml the mnnber-wheels as ssasso a reverse movement by the locator and since the master-wheel clutch is held in engagement with the master-wheel by the locking-lever, it follows that the actuator-pinion 30, connected. to the clutch, will be held against reverserotation, thus preventing the retraction of the actuatingdever 3.5 or any other element of the operating connection be tween the pinion and the key-stem. The retraction of the operating connections designed to take place as the master-wheel moves from one number-wheel to the next. Therefore the trip-arm 5-1 of the trip-devoi- 52 is formed with a tooth 57, disposed to engage a series of fixed trips 58 at the front end of the computing device 23.- (See Fig. 2.) This specific arrangement for operating the locking-lever constitutes no part of'the pres ent invention, and 'it is therefore deemed to e unnecessary to do more than remark in this connection that as the carriage advances to shift the mastenwheel from one di incenrier to the next carrier of lower order the tooth 57 will on age one of the trips 58, which will cause t e trip-arm 5-1 to be swung back, the locking end 53 to be withdrawn from behind the clutch 29, and the arm 51 to be brought back into engagement with the ratchet In other words, the movement of the master-wheel under the impulse o'f'a key effects the movement of the locking'lever 52 irom the position shown in full. lines in Fig. '7 to the dotted-line position in said figure, and the operating connections are thus locked against retraction, but are released during the movement of the carriage, since the lever 52 1s restored to the full-lino position in Fig. '7 by one of the trips When the locking-lever is thus restored to normal position, the clutch 29 is permitted to move ack out of engagement with the masterwheel and the operating connections will be "a movement instantly retracted.

The means the master-z0heeZ.-'i/V, will v now describe what is perhaps the most important feature of the present inventionto :wit, a novel arrangement, including stop mechanism, whereby the master-wheel will be arrested with certainty and precision when it has completed corresponding in extent to the value of the key depressed. This mechanism embraces a series'oi aiined stops, each oi which is appropriate to and designed tobe moved to its operative position by one of the keys. Designed to cooperate with thesekeyoperated stops is a second series of stops dis posed in a spirally-arranged series and movdole in one direction with the ma'stenwheel. When the master-wheel is operated by a given key, a stop appropriate to that key is moved thereby into position to be engaged by the appropriate stop of the spiral series to arrest the master-wheel at the proper point.

The shaft 31, to which, as we have already or preventing ocermnning of wardly through the plate 5*.

seen, the actuator pinion 30 is fixed, is equipped. with a spirallysrranged series of stops 1, 2 3", 4 5 6*, 7, 8, and 9*. (See Figs. .2, 5, 10, and 11.) Since the several stop members of the spiral series are rigidly connected and, in fact, are preferably integral, i. shall refer to them in the aggregate as a spiral stop member 31. This spiral stop member necessar l rotates with the master-wheel when the latter is operated by the depression of a key and is designed to cooperate with any one of an alined series of stops 1*, 2 3 4 5 6', 7, 8 and 9 in the form of plates disposed side by side Within. the actuator-frame. (See Figs. 5, 10, and 11.) Each stop-plate is held in its normal position by a spring 59, secured. at one end to the plateand at its opposite end to a transverse member 60, to'which all of the several springs are connected. The springs are preferably disposed in staggered arrangement, as shown, in order to accommodate them within a small compass. The front ends of the several plates normally abut against the under side of a bar 61, and the several plates are guided in their movements by thin fins 62, pendent from'the front ends of the plates and received within the slots of a guidebar 68. (See Figs. 5 and 10.) Normally, as shown in Fig. 10, the stopplates are retained in retracted position-that is to say, with their front ends withdrawn from'interfering relation with the spirally-arranged stops 1 2, etc. Itis designed, however, to provide means whereby each of these stops will be operatively related to one of the keys in a manner to cause the projection of the stop into the path of movement of one of the stops moving with the HIZLS'BGI'JIVlIGGl, it being undcrstood that each stop of the alined series is sp ral series, so that its projection to its operative position, as shown in dotted lines in Fig. 10, will dispose it in position to be engaged by the appropriate stop of the spiral stop member according to the value of the particular key depressed.

he means for throwing the stop-plates to wit, the stops oi" the alined seriesinto operative position includes a series of hellcranl; levers 64, mounted on the shaft 65, as shown in Fig. 10. The vertical arm of each lever 64 is pivotally connected, as indicated at 65, with one of the stop-plates, while the horizontal arm 66 of each bell-cranklever is disposed over and arranged to be operated by the inner arm 67 of one of a series of rockshafts 1, 2, 4, 5, 6", 7, 8, or 9". The several rock-shafts 1 2, &c., are mounted in suitable bearings 68, secured to the coverplate 5*, and are provided at their outer ends with arms 69, disposed over and arranged to be elevated by cam-arms 70, extended up- The cam-arms 7O swing from the shaft 42 and are preferably .iormed integral with the several loose arms 44., mounted thereon.

'We have already seen that each oi the several arms 44 is ail'orded an operative connec tion with one of the several numeralkeys, and it will now be apparent that when any numerahkey is depressed it will cause a loose arm 44 to swing down and a cam-arm 70 to swing up. This movement of the arm 70 will rock one of the shafts 1 2, &c., and the elevation ot the arm 67 at the inner end oi .said shaft will cause the rocking of one of the hell-crank levers 64., which will in turn. project one oi the stop-plates 1* 2, &c., to the position shown. in dotted lines in Fig. 10. Tll'hus one of the alined of stops will be set in its operative position by the initial movement of a key and will be disposed to be engaged by and to arrest one of the stops oi the spiral series when the master-wheel has completed a movement corrospending in err-- tent to the value of the particularkcy depressed. .As has been explained heretofore, the downward movement of the arm 44 not only ellects the setting of a stop in the manner just described, but also serves, either during or after the setting of the stop, according to which key is considered, to depress one of the fixed arms 46, and thus effect the rotation of the 1mister-wheel througl'i the intermediate connections. is the nutster-whecl rotates the spiral stop member 3i will rotate therewith. This movement will be continued until that one of the spiral stops which corresponds in position with the particular key depressed engages that one ol the alined series of stops which has been jnojected to its operative position. The front end ol the stopplate thus engaged will be thrown down until arrested by the guide-bar 63, as shown in Fig. 1]. When this occurs, further movement of the shaft 31 will be prevented, and as a consequence the master-wheel will be stopped with certainty and precision. when it ias completed its proper movement. The depression of the key having recorded and. registered a digit, said key will rise to its normal position upon the removal of the operators finger therefrom, and as the carriage will advance during such retraction o the key the operating connections will be released by the trip of the locking-lever 152. W'hen released, the operating connections will be retracted in a manner heretofore explained, and as these connections include the actuator-pinion 30, which is rigid with the shaft 31, the latter will rotate back to its normal position and with it will move the spiral stop member. This reverse movement of the stop member will serve to release the stop-plate previously engaged by it, and the latter will be retracted to its normal position by its spring 59.

The retraction of the several loose arms 44 szaeeo and cam-arms 70 to their normal positions is cfi'ected by retracting-springs 71, secured to the arms 70 and to the under side of the cover-plate 5 I The action of the stop mechanism just described is augmented by the provision of a check-arm 7 2 having a beak 73 designed to be moved into-engagement with a tooth of the master-wheel 25 just as the latter reaches the limit of its proper movement. The check-arm 72 is extended laterally from a check bar or shaft 74-, (see Fig. 7,) journaled in the actuatonha'nie, shown in F 5. ln addition to the check-arm 72- the check bar 7 1 is equipped with a laterally-disposed plate 75, designed to be engaged and depressed by any one of a series of depressingarms 76, extending upwardly from each of the stop-plates 1" 2, &c., and each having an angular upper end 77 extended over the adjacent edge of the plate 75. When any one of the several stop-plates is set by a key, the upper end 77 of its depressing-arm is brought into engagement with the plate 75. (See the dotted-line position in Fig. 19.) When therefore the front end of the stopplate is swung down by the spiral stop member to the position shown in Fig. 1 1, the plate 75 will be swung down or depressed by the arm 76. This IIlOVGIl'lGIlt of the plate will cause the check-bar 74 rock, and the checkarm 7 2 will thus be swung 'from the full-line position in'Fig. 7 to engage and check the further movement of the master-wheel, as shown in. dotted lines in said figure.

To prevent premature movement of. the check-arm 72, the check bar is provided with a pointed projection 78, engaged by a swinging detent 79, urged to its engaging position by a spring 80 and haying a projection 81, over which the projection 79 is designed to ride when the check-bar 74 is rotated. The detent 7 9 thus serves to yieldingly retain the check-bar and its associated parts in either of two extreme positions. The return of the check-bar to normal position after it has been rocked to throw down the check-arm is effected by the actuatingdever 35, equipped with a lateral projection 0r stud 82, which when the lever is retracted engages and elevates an arm 83, projecting from the checkbar. (See Fig. 12.) By reason of this arrangement the check-arm when operated to engage the masterwheel remains in its engaged positions until the operating connections are released during the advance of the carriage to the right. As soon, however, as these connections are thus released the u ward movement of the lever 35 will effect t e elevation of the arm 83, thus rocking the check-bar back to its normal position and incidentally withdrawing the check-arm from the wheel and restoring the plate 75 to the position shown in Fig. 10. i

The check-slide for preventing accidental carrying when the operated wheel of the computing device is brought to rest in the 9 p siti0n.In some forms of computing devices which are capable of use in connection with the operating lmechanism herein described the arrest of the operated wheel in the 9 position sometimes results in accidentally advancing the next adjacent wheel of order. To prevent this, a check-slide84 is mounted adjacent to one side of the masterwheel and is connected to the lower end of an arm 86, depending from the check-bar 74. When the check-bar is rotated to move the check-arm into engagement with the masterwheel, it swings the arm 86, which projects the slide 84 to the position indicated in Fig. 11. When the slide 84 is thus projected, its

front end extends ovena tooth of the num-. her-wheel of next higher order than the one engaged by the master-wheel, and thus prevents accidental carrying movement in case the operated wheel is brought to rest at the 9 position.

The means for disconnecting the operating connections ofthe computing device from the numcral-lccys to permit the unrestricted use of the for instance, to facilitate the printing of totals-4n order to avoid burdening the keys with the master-whoel-operating connections when printing outside of the column being totalized and in order, furthermore, that the total may be printed at the foot of the column without operating the computing de- "ice, provision is made whereby the depression of a total-key will move the several fixed arms 46 to inoperative positions-that is to say, to positions sufficiently depressed to prevent said arms from being moved when. the numeral-keys are operated To this end a total key or lever 87 (see Fig. 9) is fulcrumed upon a bracket 88, secured to the plate 5 adjacent to one end thereof. The short end of the lever 87 is extended under the curved upper end of the cam-arm 70, which is operated by the 9 key,,the relation of the parts being such that when the rear end of the lever is depressed to the position indicated in dotted lincs'in Fig. 9 the cam-arm 70, engaged by the lever, will be swung forward, thus depressing the loose arm 44, which, in the case of the 9 key, is normally in engagement with the fixed arm 46. 7 Thus the depression of the total key or lever will cause Sfififl fixed arm to swing down, and thus rock the shaft 42 to present the several fixed arms 46 in ino erative positions. Therefore if any of the eys are subsequently depressed .to print digits, either within or outside of the column being totalized no movement will be imparted to the master-wheel, and the total or any other matter may therefore be recorded without effecting the operation of the com uting device. The lever 87 is yieldingly retained at its opposite limits of movement by a'detent in the form of a spiral spring 89, secured to the higher bracket 88 and lever 87 at opposite sides of the fulcrum of the lever, so that the medial line of the spring will be below the fulcrum of the lever in one position and above the fulcrum in the other position thereof.

The means for automatically restoring the operative connection between the numerallce'gs and the master-wheel subsequent to'thc printing of the total.-Upon the back/wall of the carriage-casing 5 is fulcrumed a total-keyretracting lever 90, one end of which projects slightly above'the top of the casing, as shown in Fig. 5, and is depressed by the total-key or lever 87 when the latter is thrown down to the dotted position in Fig. 9. The depression of one end of the lever 90 bythe total-key in the manner stated causes ac'orresponding elevation of the opposite end of the lever, Whlghls provided with a pivoted arm 91, the move i inent of which in opposite directions is limited 83 .by stops 92 'and 93. (See Fig. 5.) The arm 91 is normally retained in the position indicated in Fig. 5 by a spring 94.

Disposed to cooperate with the arm 91 is what may be termed a (see Fig. 8,) depending from the under side of the computing device 23. As the carriage advances to the right with the total-key depressed the engagement of the arm 91 with the trip will fail to effect any movement of the lever 90, since the arm 91 will merely yield against the resistance of the spring 94, and thus pass idly under the trip 95. When, however, the total has been rinted and the carriage is retracted to record a new number total-key trip 95,

ice

or to begin a new line of writing, the arm 91 will engage the trip 95 and bein prevented from yieldin by the stop 92 wil cause the depression 0% one end of the lever 90, thus elevating the opposite end thereof and restoring the total-key to its normal position. It

will be observed that it is only necessary to move the lever 90 a sufficient distance to move the total-key until its spring moves above the axis of its lcrum, after which the spring 87, as well as o. e of the springs 71, will assist in restoring the total-key to normal position. When the total-key is thus restored, the several fixed arms 46, together with the rock-shaft and associated parts, will swing back for the purpose of again establishing an operative connection between the keys the master-wheel. i

' It is thought that the foregoing desoription is sufficient for the purposesof this disclosure. It is evident, however, that various features of the invention may be embodied in structures other than those illustrated, I

and the right to effect such changes, modifications, and variations as may come Within the scope of the protection prayed is therefore expressly reserved.

What we claim is I 1. In a calculating-machine, a computing device having denominational members,- a

series of keys erranged to cause the operation of either said members independently of those of lower order, a graduated series of stops movable with the member operated, a second series of stops normally out olicor'iperative relation with thesto'ps of ill' irstscries, and means whereby when a licyi moved to cause the operation ol' a dcnominatimial member of the computing device and thrstops'ol. the first series, 1 top of the sccoi'i-zl series will be moved into interfering; reh'ition with stop of theilirst series to anost the movemei'it of the denomina ional member at the proper point.

In. a calculating-machinc, device having a series of done. iinational members, a master means arranged to opcrrite said members in succession, a graduated series of stops movable with the master means, series of keys each of which is arren 'ed to move the master means and the graduated series of stops, and a secinid scries of stops each opi-irat-ivelv comiect ed with one of the keys and arranged to he moved into interfering relation with one ot' the stops of the". graduated seltcs when a l e v is dcpressed, whereby the movement of the dcnominational member will be arrested at the proper point By the interference ol" the stops. 3. In a calculating machino, a computing device including a series of dcnoininalional membes, a key-om 'atcd mastcr-actuator arranged'to operate her or" said members independently l those of lower order. and means including a spiral stop for arresting the movement of the actuator and the denominational mom her ope ated thcrchv.

Lin a calculatingmachine, a computing}; device iiiicluding' a series of dcnominational members, a master-wheel arranged to directly engage and operate each of said members independently of those of lower or-zl r, a spiral stop member rotatable with the wheel, and means cooperating with said number and arranged to engage and arrest the movement of the wheel at the proper point .5. In a cal(mlating-maclline, a computin device including a si'irics of denomiinitional members, actuating mechanism therefor arranged to directly engage and actuate each of said members ii'idcpenden tly ol" those of lower order, a graduated series of stops movable with the actuating mechanism, and means cooperating with said stops to arrest the actuating mechanism at (li'l'l'crent points.

6. In {L calculating-machine, a computing device including a series ol denominational members, keys each arranged to operate each of szndinemhers independently of those of lower order, and a key-operated spiral Stop member arranged to arrest the movo ment of a denominational member.

71 In a calculating-machine, a, computing device including a series of denomiinational members, an actuator arranged to operate rompuling sive members, a plurz'ilit v of keys, and

o e,rat d s: i s of stopscooperating to arrest the niovcn'icnt ol' a denominational in c in her.

5%. In a calciilating-machine,-a computing device in luding a scriespl denominatitinal mc-mhcrs, actuating n hanism arranged to actuate all) member indepcnLlently of those of lower orde luralirv of keys, and tvvo sci .S ol liCjf'Up'tI ted stops, thc stops of one series heing noin'iallv inc: and the stops ol' the other series having; graduated arrangement, the stops of S2, '1 series hcin disp to cooperate to limit tizcopcrzztitm 0t 1' lic cnipitting;- device.

5). ln a calculatirig-machine, a computing device including a scrics o'l dcnoininational members,lie arranged to opcratc any inein hor independently o'l' those o'l lovvcr order, and nicq-ns for preventing overthrow ol' tlic computing device, said means including two scrics oi coi'ipcrating stops, one of said scrimol stops having: a spiral arrangement.

it), In a calculating -inachinc, a computing device having: donominational nicu'ihcrs, an actuator arranged to operate successive members, a st'ip mc-mhcr movable with the actuator and having-r a-spirall v-arrangcd sic-- lies of stops, and a second scrics of stops dispuv d to coi'iporate \vith thespirally-armngcd series ol stops to arrest the movement ot a dcnominational member.

H. in a calculatingunachino, a computing di r'ice having dcnolninational mcmhers, actuiiting mechanism arranged to actuate either dcnominational menthol indopoi'nh entlv of those of lower ordcr, and two series olcoi'iporating stops to! the actuating incchaiiiszn, one series of stops bring movable in nison and the stops ol the other series bcinp indopcndcntlv movable into operative po ition to arrestthe movement ol' the actuating mechan sm alter a givcn operation of tho (unnputi'ugr device.

1 ln a calculatingunachino, a computing device including a series ol' dcnominational members, a series oi hovs arlnnged to operate any member imlcpendcntlv of those of lower order, and stop mechanism including a spirally-arranged l \(),'it)lttli0(l series of stops movable in unison and asccondserics of stops each of which is indcpendentlv movable into operative relation with a stop ol' the spiral series to arrest the movement of a denominational member.

13. in a calculating-machinc, a computing: device including a series of donominational members, a master-wheel movahle to engage and operate successive members, a spirallyarranged series oi" stops moval'ile with the master-wheel, and a normally alined series of stops each of which is independently movable into cooperative relation with it stop of the other series to arrestthe lnovernentol a denominational member.

device including a series of denominationa members, keys for moving each of'said members independently of those of lower order, and stop,;mechanism for said computing device inelnding a plurality of' stops arranged to be operated by the keys to arrest the movement of the denominational members.

15. I calculatingmachine, a computin device i eluding a series of denomir iationzil members, keys for moving either of said members independentlyof those of lower order, stop mechanism including a series of stops each of which is operatively related to -a key to be moved to its operating position when the key is moved to operate the computing device, and means arranged to engage the stops so positioned to arrest the move ment of a denominational member.

16. In a computing-machine, a computing device including a series of denominational members, keys arranged to operate either of said members independently of those of lower order, and stop mechanism including a spirally-arranged series of stops arranged to be moved by the keys and to arrest the movement of the denominational members.

17. In a calculating-machine, a computing device including a series of denominational members, keys arranged to operate either of said members independently of those of lower order, and stop mechanism including two series of stops, the stops of one series being movable in unison by the keys and 'having graduated arrangement and the stops of the other series being independently movable to their operative positions by the keys to cause the movement of the denominational members to be arrested at the proper time.

18. In a calculating-machine, a computing device including a series of denominational members, a master-wheel arranged to di-- rectly engage and operate successive members, a graduated series of stops movable with the master-wheel, a second series of stops independently movable into position to cooperate with the stops of the first-named series to cause the-movement of the masterwheel to be arrested at the proper point, and keys arranged to operate the master-wheel and to .move. the stops of the second series into operative position. 19. In a calculating-machine, a computing device including a series of denominational members, a master-wheel arranged to engage and operate successive members, a key for operating the rriasteravheel, a stop movable v movement of the key tion with respect to, the stop which is with the master-wheel, and a second stop normally occupying an inoperative position but arranged to' be moved by the initial to an interfering posimovable with the master-wheel, the'inter'ference of the stops serving to cause the arrest ofthe anism including a spiral stop arranged to re tate with the master-wheelwhen the latter is moved to operate the computing device and arranged t'q be retracted to its normal position after each operation of the master-wheel.

21. In a calculating-machine, a computing device, a master-wheel therefor, an actuatorpinion, a clutch for connecting said pinion with the master-wheel to rotate the latter in one direction, means for rotating the pinion, and stop mechanism including a graduated series of stops movable with the pinion.

22. In a calculating-machine, a computing device, a master-wheel therefor, an actuator pinion, a clutch for connecting said pinion with the master-wheel to rotate the latter in one direction, means for rotating the pinion, and stop mechanism including a spirally-arranged series of stops movable with the pinion.

23. In a calculating-machine, a computin device including a series of denominationa members, keys arranged to operate either member independently of those of lower or- I der, stop mechanism including two series of stops cooperative to arrest the movement of the denominatlonal members, and a series of levers each operatively related to a key and v to a stop of one series to transmit motion from the key to said stop. I

24. In a calculating-machine, a computing device, actuating mechanism therefor including a rock-shaft, a series of arms thereon,

Ioo.

keys for swinging the arms, and stop mechanism includin two cooperating series of stops, each of t e several stops of one series being operatively related .to one of the arms on the rock-shaftand arranged to be moved to its operative position by said arm.

25. In a calculating-machine, a computing device including a series of denominational members, operating mechanism for transmittin motion to either of saidmembers indepen ently of those of lower order, and stop mechanism incl ding a series of independently-movable' tops arranged to be positionedbythe operating mechanism of the computing device and to thereafter cause the movement of a denominational member to be arrested at the proper point.

26. In a calculating-machine, a computing device including a series of denominational members, means for transmitting motion to either member independently of those of lower orde'r, and stop mechanism includin a series of independently-movable stops an a series of rock-shafts each connected to a stop to move the same and arran ed to be operated by the motion-transmitting means 27. In a calculating-machine, a computing device including a series of denominational members, keys for moving either of said members independently of those of lower order, and stop mechanism including a series of independently-movable stops each of which is disposed for actuation by one of the keys to present the stop in position to cause the ar rest of a denominational member,

28. In a calculating-machine, a computing device including a series of denominational members, keys for moving either of said members independently of those of lower order, stop mechanism including a series of independently-mowble stops, and a series of roelcshaits each disposed to be operated by a key to move one of the stops to its operative position.

In a calculating-machine, a computing device including a series of denominational members, keys for -moving either of said members independently of those of lower order, stop mechanism including a series of iii-- dependently-movable stops, a series of levers arranged to move said stops to their operative positions, and a series of rock-shafts for moving said levers, each of said rock-shafts being operatively related to akey.

, 30. In a calculating-machine, a computing device, an actuator therefor, a rock-shaft, operating connections between the rock-shaft and the actuator, a series of cam-arms extending from the rock-shait, keys each arranged to rock said shaft and to move a cam arm, a series oi rock-shafts each of which is moved by one of the cam-arms, a series of bell-crank levers each arranged to be swung by one of the rock-shafts last named, and stop mechanism including a series oi indd pendently-movable sto s each arranged to be moved by one of the be l-crank levers.

31. In a calculsiting-machine, a computing device, a master-wheel therefor, check-arm for themastenwheel, a plurality of cooperating stops, and means operated by one oi" the stops for moving the check-arm to its engaging position.

32. In a calculating-numbine, computing device, a master-wheel therefor and a checl armlor the master-wheel, stop mechanism including a series'of independently-n ovable stops, and means arranged .to be operated by either of. said 'stops to. move the checker-"m to its engaging position.

33. In a'calculating-machine, a computing device, a masterheel therefor, a oheckarm for the master-wheel, two series of cooperat ing stops, and means operated by certain of said stopsior moving the check-arm to its engaging osition.

34. n a calculatingmiaehine, a computing device, a master-wheel therefor, a cheelcarm for the master-wheel, a serieaof stops movable with the master-wheel, a second series of stops each of which is movable into interfering relation with a stop of the first series and each of which is capable of further movemen't after being engaged by a stop ofthe" first series, and. means arranged to be operated by either stop of the second series during the final movement thereof to move the check-arm to its engaging position.

35. In a calculating-machine, a computing device, a master-wheel therefor, a check-bar, a check-armcarried bythe bar and disposed to engage the master-wheel, and two series of cooperating stops, certain of said stops being disposed to rock the check-bar to throw the check-arm to its engaging position.

In a calculating-machine, a computing device, a master-wheel therefor, a check-bar, a check-arm carried by the bar and movable to engage the master-wheel, a plate extended laterally from the check-bar and stop mechanism including two series of cooperating stops, the steps of one series being provided with depressing-arms disposed to engage and move the plate and to thus rock the checkbar and move the check-arm to its engaging position.

37. In a calculating-machine, a computing device, a'mastcr-wheel therefor, a check-arm movable'to engage the mester-wheel, a spirally-arranged series of stops movable with the master-wheel, an alined series of stops each movable into interfering relation with one of the steps of the spiral series and also having lii'nited movement aiterbeing engaged by said stop, and means whereby the final movement of any one of the alined series of stops will ei'lect the movement oi the eheelc arm to its engaging position.

:38. in a calculating-machine, a computing device, a master-wheel, a check-arm disposed to engage the master-wheel, means for yiel lingly retaining the check-arm in its engaged position, mechanism movable to operate the master-wheel and. arranged to be retraetrr independently thereof, and means whereby said mechanism when retracted will positively move the check-arm out of engagement with the master-wheel.

' 39. In a caleulating machine, a computing device, a mastenwhoel therefor: a check-arm tor the IiltiStQF-Whfifil, an actuating member arranged to rotate the lIlQSiAP-I*t\l10ll, means for movingthe check-arm t engage the -Wheel, and means ope r ated by the actuating member for moving the check-armto its dis engaged position.

e0." In a calculatinganachinc, a computing device, a'master-whecl, a check-bar having a check-arm disposed to engage the masterwheol, an actuating-lever for the masterwheel, a second arm extending from the check-bar, and a projection extending from the actuating-lever and arranged during the retraction of said lever to strike and swing the-llast-named arm for the purpose of rock ism including a series ing the check-bar to Withdraw the check-arm from the master-wheel. i

41 In a calculating machine, a computing device, including a series of number-Wheels, actuating mechanism therefor, stop mechanof stops, and a checkslide arranged to be moved by any of said stops to engage a wheel of the computing de- 42. In a calculating-machine, a computing devlce including a series ofnumber-wheels, a

master-wheel-therefor, a check-bar having acheck-arm disposed to engage the wheel, and

master- 'a check-slide arranged to be ved y the check-bar to engage'one of'the ,ranged to operate wheels 0 the computing device.

'43. In a calculating machine, a com uting device, amasteiewheel, a check-slide orthe computing device, and arotary check-bar arboth the check-arm and the check-slide. I v

44,111 a calculating-machine, a com uting device and actuating mechanism therefor,

' having relative lateral movement, recording mechanism cperatively connected with the mech actuating mechanism of the computing device, means for disconnecting said actuating mechanism from the recording mechanism to permit the printing of the total While the actuating mechanism isin engagement With the computing device, Without effecting the operatlon of said device, and means for automatically restorin the connection between the actuating mec anism and the recording anism. P 45. In a calculating-machine, a computing device, actuating mechanism therefor, printmg mechanism normally connected with the factuatmg mechanism, a carriage movable laterallywith respect-to the computing de' vice to eflect relative movement of-the com puting device and its actuating mechanism,

I "means for'dis'connecting the printing mechanism from the actuating mechanism to perf'nnt the printing of totals While the actuating inechamsmiis in engagement withthe coinputing. device,

and means brought into actron upon the retraction of the carriage to restore'the connection between the printing mechanism and the actuating mechanism'of the, computing device.

46;, Inacalculating machine, acomputing evice,'act uati ng mechanism therefor, printechanis'in connected to the actuating mechanism, a carriage movable laterally with relation'to the computing device to effect relative movement 0 said device and its actuating mechanism, a total-key arranged to disconnect the pr nting mechanism from the actuatingmechanisn to permit the print mg of totals, and means including a trip brought into action during the retraction of the carriage to restore the'total-key to its normal position.

47, Ina calculating-machine, a computing device, actuating mechanism therefor, printmgmechanism connected to the actuating mechanism, a traveling carriage, a total-irey for disconnecting the printing mechanism from the actuating mechanism to permit the printing of totals wmle the actuating mechanism is in engagement with the computing device, a total-keyretracting mechanism including a lever and a trip, one of said elements being movable with the carriage'and presentable to the other to effect the retraction of the total-key.

48. In a calculating-machine, a computing device, a-traveling carriage, actuating mechanism for the computing device mounted on the carriage, printing mechanism connected with the-actuatlng mechanism, a total-key for disconnecting the printing mechanism from the actuating mechanism, a lever movable with the carriage, and a trip mounted independently of the carriage and arranged to effect the actuation of the lever to retract the total-key.

49. In a'calculating-machine, a computing device, a traveling carriage, actuating mechwith the carriage, printing mechanism also movable with the carriage and connected to the actuating mechanism, a total-key mount ed. on the carriage and movable to disconnect the rinting mechanism from the actuatin r mechanism, mounted on the carriage, a trip associated with the computing device and arranged to a total key retracting lever operate the lever as the carriage is retracted,

and means whereby the tri will be pgievented from operating the lever uring theadvance of'the carriage in the direction of letter-spam $51. The combination with a computing mechanism including a series of deno minational members, of a series of keys arranged to transmit'motion from the finger of an op erator to either member independently ofthose of lower-order, a graduated series of 

